Re: [PATCH V2 2/2] fs/super.c: don't fool lockdep in freeze_super() and thaw_super() paths

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On 09/27, Oleg Nesterov wrote:
>
> On 09/27, Jan Kara wrote:
> >
> > You can run either:
> >
> > 	./check -g freeze
>
> passed all 6 tests.
>
> > to check just the freezing tests or
> >
> > 	./check
> >
> > to run all sensible tests which is what I'd do (but it will take couple of
> > hours to pass). If that passes, chances are good there are no easy false
> > positives.
>
> It seems that generic/001 just hangs on my laptop. With or without this change.
> Or perhaps I didn't wait enough...

/usr/bin/awk spins in user-mode forever, according to strace it doesn't do
any syscalls. I didn't even try to investigate.

> Or perhaps something is wrong with my very
> limited testing environment. I'll reserve a testing machine tomorrow.

Jan, I gave up.

Whatever I did xfstests-dev/check reports a lot of failures, kernel bugs,
and finally either crashes the kernel or hangs.

With or without this change, and I didn't notice any warning from lockdep.
So I hope we can apply this patch. At least 1/2 which fixes a bug.

Oleg.

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